(19)
(11) EP 2 074 281 A2

(12)

(88) Date of publication A3:
28.08.2008

(43) Date of publication:
01.07.2009 Bulletin 2009/27

(21) Application number: 07854213.1

(22) Date of filing: 19.10.2007
(51) International Patent Classification (IPC): 
E21B 43/14(2006.01)
E21B 36/00(2006.01)
 E21B 36/04(2006.01)
(86) International application number:
PCT/US2007/081901
(87) International publication number:
WO 2008/051827 (02.05.2008 Gazette 2008/18)
(84) Designated Contracting States:
DE FR GB IT NL
Designated Extension States:
AL BA HR MK RS

(30) Priority: 20.10.2006 US 853096 P
20.04.2007 US 925685 P

(71) Applicant: Shell Internationale Research Maatschappij B.V.
2596 HR The Hague (NL)

(72) Inventors:
  • BEER, Gary Lee
    Houston, TX 77077 (US)
  • STEGEMEIER, George Leo
    Houston, TX 77096 (US)
  • ZHANG, Etuan
    Houston, TX 77096 (US)

(74) Representative: Zeestraten, Albertus W. J. 
Shell International B.V. Intellectual Property Services P.O. Box 384
2501 CJ The Hague
2501 CJ The Hague (NL)

   


(54) HEATING TAR SANDS FORMATIONS WHILE CONTROLLING PRESSURE